TC1121EUA

Voltage - Output (Min/Fixed):	-Vin
Base Part Number:	TC1121
Supplier Device Package:	8-MSOP
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	10kHz ~ 200kHz
Current - Output:	100mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	2.4V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Charge Pump
Output Configuration:	Negative
Function:	Ratiometric
Part Status:	Obsolete
Packaging:	Tube

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TC1121EUA Application Field and Working Principle

Introduction

TC1121EUA is a linear voltage regulator developed by Texas Instruments (TI). It is a low-power, low-dropout voltage regulator that offers two advantages over traditional linear regulators: it has a higher efficiency and requires fewer external components. It can be used in a variety of applications, including portable devices, laptop computers, and automotive systems.

Application Field

TC1121EUA is a DC-DC switching regulator, which offers a wide input voltage range from 3.3V to 20V and is designed for applications that require a constant output voltage with a tight line regulation. It can provide an output voltage of up to 1.25V with an accuracy of ±1%. The device can be used to power a variety of devices, including microprocessors, FPGAs, memory chips, ASICs, RFID readers, and audio amplifiers. This regulator also offers good transient response and line regulation, making it ideal for applications where noise is a concern.In addition, the output current is adjustable, so that the device can be used to provide multiple outputs with different current requirements. It also has protection features such as under-voltage lockout, over-current protection, and over-temperature protection.

Working Principle

TC1121EUA works on the principle of Pulse Width Modulation (PWM). In this principle, the switching regulator is used to modulate the width of the power pulses at the output. This results in a constant voltage output with low ripple and noise, and high efficiency.The device is controlled by an external clock signal. This signal is used to modulate the pulse width of the output. The clock frequency determines the output voltage and the amount of ripple on the output voltage.The device also has an adjustable bias current input that is used to adjust the load and output current of the device. This helps in providing a constant output voltage as the load current changes.The TC1121EUA also has an Enable input, which can be used to shutdown the device in order to conserve power or to control the output voltage.

Conclusion

The TC1121EUA is a DC-DC switching regulator that provides a constant output voltage with high efficiency, low ripple and noise, and adjustable output current. It is ideal for applications where noise is a concern, such as in portable devices, laptop computers, and automotive systems. The device is also easy to use and has protection features for added safety.

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